I am building an alpha type Stirling engine for a university project - powered by a tealight, so fairly small in size.I also have to analyse the friction in the engine, and consider how it could be optimised.One thing that I want to measure is the friction in the piston cylinder used, though I am unsure how would this could be done?If anyone has any other suggestions or ideas about how else to measure the friction in other areas, it would be appreciated.Thank you!